How severe is CVE-2018-3609?

CVE-2018-3609 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-3609 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 22% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-3609?

CVE-2018-3609 primarily affects Trendmicro Interscan Messaging Security Virtual Appliance. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-3609?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-3609 published?

CVE-2018-3609 was published on 2018-02-16 and last updated on 2026-06-17.

CVE-2018-3609

CVE-2018-3609 is a high-severity vulnerability in Trendmicro Interscan Messaging Security Virtual Appliance with a CVSS 3.x base score of 8.1. Its EPSS exploit-prediction score of 22% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-532.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 4.3
EPSS exploit prediction: 22% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-532
Affected product: Trendmicro Interscan Messaging Security Virtual Appliance
Published: 2018-02-16
Last modified: 2026-06-17

Description

A vulnerability in the Trend Micro InterScan Messaging Security Virtual Appliance 9.0 and 9.1 management portal could allow an unauthenticated user to access sensitive information in a particular log file that could be used to bypass authentication on vulnerable installations.

Frequently asked questions

What is CVE-2018-3609?: A vulnerability in the Trend Micro InterScan Messaging Security Virtual Appliance 9.0 and 9.1 management portal could allow an unauthenticated user to access sensitive information in a particular log file that could be used to bypass authentication on vulnerable installations.
How severe is CVE-2018-3609?: CVE-2018-3609 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-3609 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 22% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-3609?: CVE-2018-3609 primarily affects Trendmicro Interscan Messaging Security Virtual Appliance. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-3609?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-3609 published?: CVE-2018-3609 was published on 2018-02-16 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:trendmicro:interscan_messaging_security_virtual_appliance:9.0:*:*:*:*:*:*:*
cpe:2.3:a:trendmicro:interscan_messaging_security_virtual_appliance:9.1:*:*:*:*:*:*:*

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